Timing Gear Drive

Has anyone used the timing gear drive set from Thunderchicken? I'm told these are Chinese imports. I find goods from China can vary tremendously in quality, not neccasarily all junk.

I see the Milodon set for the LA smallblock has the same part number as for the old 392 Hemi(which I have), and I know regular timing chain sets interchange between the two. So I'm hoping someone has some real world comments about the smallblock Thunderchicken set, which looks like is the same for the 392. They advertize different prices though for the two applications so maybe there IS a difference?

Much appreciated, thanks.